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How to create a self-signed certificate with OpenSSL
...me = subject
req_extensions = req_ext
x509_extensions = x509_ext
string_mask = utf8only
# The Subject DN can be formed using X501 or RFC 4514 (see RFC 4519 for a description).
# Its sort of a mashup. For example, RFC 4514 does not provide emailAddress.
[ subject ]
countryName ...
Difference between ObservableCollection and BindingList
...ndingList<T> has the perf penalty only because it is doing something extra that ObservableCollection<T> doesn't support as a feature. Make the latter implement change notification of inner items and give the changedItem's index, it would incur the same. I just think it was a mistake of B...
How to interpolate variables in strings in JavaScript, without concatenation?
...
You can take advantage of Template Literals and use this syntax:
`String text ${expression}`
Template literals are enclosed by the back-tick (` `) (grave accent) instead of double or single quotes.
This feature has been introduced in ES2015 (ES6).
Example
var a = 5;
var b = 10;
con...
How to check if a table contains an element in Lua?
...out that you can't actually use the 'element' as a key, because it's not a string for example, then add a checksum or tostring on it for example, and then use that as the key.
Why do you want to do this? If your tables are very large, the amount of time to iterate through every element will be sig...
Convert JSON to Map
...-databind/#5-minute-tutorial-streaming-parser-generator), you'd do:
Map<String,Object> result =
new ObjectMapper().readValue(JSON_SOURCE, HashMap.class);
(where JSON_SOURCE is a File, input stream, reader, or json content String)
...
How to do relative imports in Python?
... the module were a top level module, regardless of where the module is actually located on the file system.
In Python 2.6, they're adding the ability to reference modules relative to the main module. PEP 366 describes the change.
Update: According to Nick Coghlan, the recommended alternative is ...
Need to ZIP an entire directory using Node.js
...eir code (like me).
const archiver = require('archiver');
/**
* @param {String} source
* @param {String} out
* @returns {Promise}
*/
function zipDirectory(source, out) {
const archive = archiver('zip', { zlib: { level: 9 }});
const stream = fs.createWriteStream(out);
return new Promise(...
What is aria-label and how should I use it?
...is rather common since sighted users and developers are less likely to put extra effort in extensive testing with screen readers while on the other hand ARIA specs and validators are currently far from perfect and even confusing in some cases. On top of that each browser and screen reader implement ...
Extracting text from HTML file using Python
...'d like to extract the text from an HTML file using Python. I want essentially the same output I would get if I copied the text from a browser and pasted it into notepad.
...
WPF chart controls [closed]
...rts lots of 2D charts and zooming without animation, might need to do some extra work for smoother zooming.(This service is no longer available)
DevExpress ChartControl. Supports most common 2D Series types, zooming and panning (scrolling) operations can be performed using the mouse, keyboard, and t...